* {
    margin: 0;
    padding: 0;
    text-decoration: none;
}

html,
body {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: url(./img/bj.jpg);
}

.nei {
    width: 400px;
    height: 400px;
    background-color: white;
    border-radius: 15px;
}

.nei p {
    display: block;
    line-height: 80px;
    text-align: center;
 
    color:#ccc;
    font-size: 20px;
    border-radius: 15px 15px 0 0;
}

.nei .xia {
    width: 340px;
    height: 360px;
    margin: 30px;
}

.nei input {
    width: 330px;
    height: 40px;
    padding-left: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 10px;
    outline: none;
}

a {
    color: #aaa;
}

.deng {
    width: 60px;
    line-height: 35px;
    color: #fff;
    background-color: rgb(110, 215, 110);
    margin-top: 20px;
    border: none;
    border-radius: 5px;
    margin-left: 135px;

}